{"id":276,"date":"2025-05-02T21:10:38","date_gmt":"2025-05-02T20:10:38","guid":{"rendered":"https:\/\/guillaumesblog.net\/?p=276"},"modified":"2025-05-02T21:11:27","modified_gmt":"2025-05-02T20:11:27","slug":"site-to-site-vpn-oci-to-on-prem-with-cisco-2921","status":"publish","type":"post","link":"https:\/\/guillaumesblog.net\/index.php\/site-to-site-vpn-oci-to-on-prem-with-cisco-2921\/","title":{"rendered":"Site to site VPN OCI to on-prem with Cisco 2921"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I am trying to setup a S2S connection between Oracle OCI to my home network to try a hybrid on-prem to cloud setup. I follow the model described here: <a href=\"https:\/\/www.oracle.com\/cloud\/networking\/site-to-site-vpn\/\">https:\/\/www.oracle.com\/cloud\/networking\/site-to-site-vpn\/<\/a>, I&#8217;ve got access to the OCI documentation and it actually does mention my router (albeit a different iOs version!)&#8230; but still no luck, I can&#8217;t make it work. \ud83d\ude41<\/p>\n\n\n\n<!--more-->\n\n\n\n<p class=\"wp-block-paragraph\">As everything with network setups it does get tedious and it is not trivial at all, there are really a ton of configs to go through. I also think the version on the Router play a role in the commands availability and compatibility, it is not helping, and if I want to update my router, Cisco does not let me do it because I have to have an account and subscription.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Imagine, just to get my VDSL internet connection up with Cisco 2921 it was difficult, I did setup a basic connectivity using PPPoE and my internet service provider credentials, and a small tp-link modem as bridge in front of the router, but had trouble with internet login pages not showing, even though I could ping out to the world; in the end and after two evening of research MTU and <strong>MSS<\/strong> size were to blame (in my case 1492 and 1452, if you are wondering), and MTU applied on my WAN port and MSS applied on my internal LAN port.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Site to Site VPN seems even more complex and I do not have enough basics on VPN security. I think I&#8217;ve got some homework to do and will revisit the issue soon, maybe some Networking colleagues can help me here? I&#8217;ll keep you posted with my progress.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I am trying to setup a S2S connection between Oracle OCI to my home network to try a hybrid on-prem to cloud setup. I follow the model described here: https:\/\/www.oracle.com\/cloud\/networking\/site-to-site-vpn\/, I&#8217;ve got access to the OCI documentation and it actually does mention my router (albeit a different iOs version!)&#8230; but still no luck, I can&#8217;t &hellip; <a href=\"https:\/\/guillaumesblog.net\/index.php\/site-to-site-vpn-oci-to-on-prem-with-cisco-2921\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Site to site VPN OCI to on-prem with Cisco 2921&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-276","post","type-post","status-publish","format-standard","hentry","category-conversation"],"_links":{"self":[{"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/posts\/276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/comments?post=276"}],"version-history":[{"count":2,"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/posts\/276\/revisions"}],"predecessor-version":[{"id":278,"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/posts\/276\/revisions\/278"}],"wp:attachment":[{"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/media?parent=276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/categories?post=276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guillaumesblog.net\/index.php\/wp-json\/wp\/v2\/tags?post=276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}